SL550pompano

I have been searching high and low and cannot seem to find any type of diagram showing where the drains are located on 2007 R230 SL550. I read somewhere about one under the front battery, easy to locate. However I cannot seem to find the ones that are supposedly located under the rear window above the trunk lid. can anyone explain location of ALL drains and how to clean them/make sure they are not clogged?
From all the other information I have obtained from this forum, I am expecting Rodeny to chime in with his expert opinion on this matter.
Thank you all in advance!

Rudeney

I'm not as well-versed on the R230 as I am the 203/209 models, but I am guessing there are similar. Looking at the parts diagrams, I see there are two front drains, one on each end of the windshield water collector. They come out behind the wheels, above the lower engine paneling. In the rear, there are drains on each corner of the C pillar. If you look in the most forward corner of the rear trunk lid seal, you'll see a small drain there. These flow into train tubes behind the trunk paneling and exit behind the rear tires. I am pretty sure that the side glass seal along the A-pillars is hollow and acts as a drain for the channel on the windshield header where the roof sits.